CVE•Published 2026-05-13•Modified 2026-10-26•0 articles on news•3 live references•NVD data

CVE-2026-42926F5 · Nginx_gateway_fabric

Vulnerability data via NVD (ingested)

CVSS v3.1

5.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS percentile

Exploit Prediction Scoring System · top 74% of all CVEs

Weaknesses (CWE)

CWE-172Improper Encoding or Decoding of Data

Description

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Timeline

Published 2026-05-13

Modified 2026-10-26

External references

NVD MITRE VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.

Shodan · vuln tag

vuln:CVE-2026-42926

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"F5 Nginx Gateway Fabric"

All exposed F5 Nginx Gateway Fabric instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Nginx Gateway Fabric"

HTTP body or banner mentions "Nginx Gateway Fabric" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42926